Handle for inside micrometer or the like



April 30, 1940. J. E. HAsTlNGs 2.199.223

HANDLE FOR INSIDE MICROMETER OR THE LIKE Filed July' 27, 1939 Q v mmfm" 1N VENTOR. James lV J si/Qgs BY ATTORNEYS.

`taken at right angles to that of Fig. 1.

.HANDLE Foa INsIDEy MICRMTER joR" I n t THE LIKEL, James E. Hastings, Athol,.Mass.,fassignorlto^ The. L. S. Starrett Company, Athol, `Mass.,ya cor-- poration of Massachusetts l =A l Application. Juiyfzfv, 1939l seriall No. 1,286,844'vl l,

t claims. Av (en 30s-.38) v Amember `4f and oppositely ,angled terminals 4"v .present invention relates to handles for supporting inside micrometers or like devices, and more particularly tovsuch as have a cylindric exterior zone on the body or other portion.

In `interior micrometer sets there has sometimes heretofore -been includeda handle capabler of being affixed to some of its parts or substituted therefor, as in the case of knurled studs screwed f into protective relation to some part," as for example, ja scale carrying sleeve."

n Such auxiliary handles are very satisfactory in interior micrometer or like sets, but, according to my concept, time can 'be saved if the workman has available a quick-acting handle so that a micrometer ,can be engaged without changing its previous condition as-to parts, or without disturbing any reading that may have been set up in` a previous measurement. 't 2 -C n f lVihile micrometersv of different vmanufacture' vary considerable in structure and design, theyk have. according to my analysis a commoncylindrical basis of comparison, and'I am ableto profvide quick-acting handles capable of `clamping an instrument of almost any make,- even Where sizes may vary,l based on the diameters of cylindrical parts of such instruments.

This I accomplish by clamping such cylindrical parts radially by angular jaws ldisposable in tan# gential surface contact, the jaws being simple and vtheir adjustment rapid. y v

As illustrative of my concept and the embodiments arising from it, I have shown in the accompanying drawing a handle in accordance with my invention. Throughout the specification and l drawing like reference characters are employed to indicate corresponding parts, and in the drawing:

Fig. 1 is a view of a handle in accordance with my inventionclamped to an indicated micrometer.

Fig. 2 is a longitudinal partially sectioned view of such a handle. t

Fig. 3 is a longitudinal View of such a' handle Fig. 4 is a View of the rjaw end of the handle'.v

Fig. 5 is a view of a jaw closer according to lmy invention, disassembled, and

Fig. 6 is a View of the jaws and jaw spring removed. l As indicated in the drawing, handles according to my invention preferably have a head1 slidably mounting a jaw closer block 2 for a pair of opposed jaw members 3.

The jaw members 3 are preferably outwardly urged as by a spring consisting of a main bow members 3 arek shown as oppositely angled in their jaw portionsuand as 'each having a cusplike extension 3 having transverse bearings 32.A

`In practice, the jaw members 3.are'made flat andfhave. an aperturev 3a' through which the terminals 4' of the kbow portion 4 of the spring are passed. Thelrbow portion v4y of 4the spring surrounds the cusp-like extension 3 of this asselnbllr asis best seenin Fig. 6. [This assembly is mounted vin the closer. block 2..' v

The assembly shown in Fig. 2 is retained in the outward opening Vofthe cavity of the jaw closer by the blockpin `5 which passes through the side Walls of the head .L This pin also re# tains the block 2 with'a slight longitudinal sliding motion under the influence of` the screw adjustment. I

, The inner walls of thehead i are flat as at I@ and the block 2 has corresponding at bearing faces as at 2%. The .bottom of the jaw receiving .cavity of the block 2 is preferably rounded to body 6` constituting the'shank of the handle as a whole.

The inner end of the block 2 is provided with a free bearing 1b for the outer point 'Iab of the adjusting screw 'I which lies within the handle body 6 and is threaded through the head l as at 12. At its outer end the; screw] carries exposed at the end of the hollow handle body 6, a knurled head 13 for rotating the screw and adjusting the jaw` closer block 2 in the head I. The jaw and f spring being loosely held on the pin 5, any advance of the screw lI lwillpress the block 2 against the rear inclines ofx they angled jaw members 3 so that they will be tightened on any micrometer barrel or like part M on which they may have v been positioned. The effect of the tightening is perpendicularly to the inner ycontacting jaw faces,"and the instrument part is gripped effecv tively .on its cylindrical diameter to give a'sure resultant hold in spite of variations in diameter. f Handlesin accordance with myk invention obtain rm holds on micrometer parts without ob` ystructing the view of scale adjustments as they are made or read. Conversely, my handles may be.` instantly released from such micrometers so that they are immediately available for other or further measurements. e

Cil

What I therefore claim and desire to secure by Letters Patent is:

l. In a handle for inside micrometers or the like, a hollow head, a block slidably disposed in said head and having a jaw receiving cavity opening outwardly longitudinally of said head, a pair of oppositely disposed angular jaw members supported in said cavity and each including a pivot cusp, a jaw spring between the cusp pivots and disposed to maintain the jaws in resiliently sustained separated relation and `contacting the' edges of the hollow head, block retaining means transversely of the head and pivotally supporting the opposed jaw cusps, and an adjusting screw having threaded engagement with said head and having a bearing point axially beyond itsthreaded engagement and freely engaging the: block.

2. In a handle for inside micrometers or the like, a hollow head, a block slidablydisposed in said head and having a jaw receiving cavity open-` ing outwardly longitudinally of said head, a pair of oppositely disposed angular jaw members, each including a pair of pivot cusps, a jaw spring including a central bow portion and kopposite angled external extensions disposed to maintain the jaws in resiliently sustained separated relation, block retaining means transversely of the head and pivotally supporting the opposed jaw cusps and retentively engaging the central bow portion fixed to said head, and an adjusting screw having threaded engagement with said head and having a bearing point axially beyond its threaded engagement, and freely engaging the block.

3. A handle asin claim 2 in which the jaw cusp bearings are apertured and the bow of the jaw spring disposed through the apertures with its ends against the inner faces of the opposite jaws.

4. In a handle for inside micrometers or the like, a hollow head, a block slidably disposed in said head and having a jaw receiving cavity opening outwardly longitudinally of said head, a

' pair of oppositely disposed angular jaw members each including a transversely grooved pivot cusp, a jaw spring including a central bow portion and opposite angled external extensions disposed to maintain the'jaws in resiliently sustained separated relation, a pin transversely of the head and pivotally supporting the grooved jaw cusps and retentively engaging the bow spring portion, and an adjusting screw having threaded engagement with said head and having a bearing point axially beyond its threaded engagement and freely engaging the block.

5. In a handle for inside micrometers or the like, a hollow head having longitudinally outwardly disposed jaw bearing edges, a block slidably disposed in said head and having a jaw receiving cavity opening outwardly longitudinally of said head, a pair of angular oppositely disposed jaw members each including a transverse pivot bearing, a jaw spring including a central bow portion andopposite ends disposed to maintain the jaws in resiliently sustained relation against the head cavity edge, a transverse pin through the head and supporting the opposed jaw bearings and retentively disposed to the central bow portion of' the jaw spring, and an adjusting screw axially contacting with the slidable head block. v

, 6. In a handle for inside micrometers or the like, a head having flat faced forwardly opening walls, akat faced jaw closer block slidably disposed in said head and having a jaw receiving cavity, a pair of flat faced angular oppositely disposed jaw members each having a transverse pivot bearing, a jaw spring disposed to maintain the jaws in resiliently sustained relation against the edges of the head opening, a ltransverse pin through the head and supporting the opposed jaw bearings and retentively disposed to `the central bow portion of the jaw spring, a tubular handle body fixed to said head, an adjusting screw having an axially free bearing in said handle body adjacent its outer end, and an adjusting head for the screw rotatively exposed at the handle end, said screw having threaded engagement with said handle head and having a bearing point axially beyond the threaded engagementand said closer block having a bearing for the adjusting screw point.

JAIWES E. HASTINGS. 

